1/*
2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#include <linux/slab.h>
19#include <linux/if_ether.h>
20
21#include "htt.h"
22#include "core.h"
23#include "debug.h"
24
25int ath10k_htt_connect(struct ath10k_htt *htt)
26{
27	struct ath10k_htc_svc_conn_req conn_req;
28	struct ath10k_htc_svc_conn_resp conn_resp;
29	int status;
30
31	memset(&conn_req, 0, sizeof(conn_req));
32	memset(&conn_resp, 0, sizeof(conn_resp));
33
34	conn_req.ep_ops.ep_tx_complete = ath10k_htt_htc_tx_complete;
35	conn_req.ep_ops.ep_rx_complete = ath10k_htt_t2h_msg_handler;
36
37	/* connect to control service */
38	conn_req.service_id = ATH10K_HTC_SVC_ID_HTT_DATA_MSG;
39
40	status = ath10k_htc_connect_service(&htt->ar->htc, &conn_req,
41					    &conn_resp);
42
43	if (status)
44		return status;
45
46	htt->eid = conn_resp.eid;
47
48	return 0;
49}
50
51int ath10k_htt_init(struct ath10k *ar)
52{
53	struct ath10k_htt *htt = &ar->htt;
54
55	htt->ar = ar;
56
57	/*
58	 * Prefetch enough data to satisfy target
59	 * classification engine.
60	 * This is for LL chips. HL chips will probably
61	 * transfer all frame in the tx fragment.
62	 */
63	htt->prefetch_len =
64		36 + /* 802.11 + qos + ht */
65		4 + /* 802.1q */
66		8 + /* llc snap */
67		2; /* ip4 dscp or ip6 priority */
68
69	return 0;
70}
71
72#define HTT_TARGET_VERSION_TIMEOUT_HZ (3*HZ)
73
74static int ath10k_htt_verify_version(struct ath10k_htt *htt)
75{
76	struct ath10k *ar = htt->ar;
77
78	ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt target version %d.%d\n",
79		   htt->target_version_major, htt->target_version_minor);
80
81	if (htt->target_version_major != 2 &&
82	    htt->target_version_major != 3) {
83		ath10k_err(ar, "unsupported htt major version %d. supported versions are 2 and 3\n",
84			   htt->target_version_major);
85		return -ENOTSUPP;
86	}
87
88	return 0;
89}
90
91int ath10k_htt_setup(struct ath10k_htt *htt)
92{
93	struct ath10k *ar = htt->ar;
94	int status;
95
96	init_completion(&htt->target_version_received);
97
98	status = ath10k_htt_h2t_ver_req_msg(htt);
99	if (status)
100		return status;
101
102	status = wait_for_completion_timeout(&htt->target_version_received,
103					     HTT_TARGET_VERSION_TIMEOUT_HZ);
104	if (status == 0) {
105		ath10k_warn(ar, "htt version request timed out\n");
106		return -ETIMEDOUT;
107	}
108
109	status = ath10k_htt_verify_version(htt);
110	if (status)
111		return status;
112
113	return ath10k_htt_send_rx_ring_cfg_ll(htt);
114}
115